Self-serving attachment for liquid vending pumps



y 1933- F. J. M NAMARA SELF SERVING ATTACHMENT FOR LIQUID VENDING PUMPS Filed July 23, 1930 3 Sheets-Sheet E JMMmna I ATTORNEY May' 30, 1933. F. J. M NAMARA SELF SERVING ATTACHMENT FOR LIQUID VENDING PUMPS 3 Sheets-Sheet 2 Filed July 23, 1930 E (lllllifamrw ATTORNEY y 1933- F. .1. MONAMARA SELF S ERVING ATTACHMENT FOR LIQUID VENDING PUMPS Filed July 23, 1930 3 Sheets-Sheet 5 li'zlmlfamana,

Patented May 30, 1933 UN ED STATES- F T I F- CE FRED J. MCNAMARAgOF STQCKBRIDGE, MICHIGAN snnr-snnvmea'rracmunnr Fora. LrQurD vE m PUMPS i I 1 Application filed July 23,

One of the principal objects of the inventioncontemplates the provision and arrangement of coin introducing and conveying passages having means located in thepath thereof to prevent operation of the pump by spurious coins.

An additional object of'the invention consists of acoin operated clutch 'mech anism' designed to establish operatlve connection between an exterior crank handle and the 1nternal plunger or pump rod.

Afurther object of the invention embodies a coin'rem'oving element located in thepath of movement of the clutch to release the coin subsequent to locking clutch elements." j I I More specifically stated the device is provided with releasing elements located at intervals and for engagement with one of the .25 clutch elements to releasethe pump plunger when reaching a predetermined position pursuant to the denomination of the coln'.

With the above andother objects in view,

, the invention' further consists of the followmg novel features and details of construction,

to be hereinafter'm'ore fully described, illustrated in the accompanying drawings and pointed out in the appended claims. Inthe drawings i Figure 1 is a front elevation of the present invention. 1

Figure 2 is a sectional View taken on line 22 of Figure 1.

Figure 3 is a top plan view of the inven tionpartly broken away to illustrate the particular disposition and relative arrangement of a coin introducing slot and coinconveying Figure 7 is an enlargedfragmentary front engagement of the j stops 25 upon one sidejthereof.

1930. Serial No. arc es.

elevation of the coin introducing slot showingthe discharge passage forspurious coins.

Referring to the drawings in detail wherein like characters of reference denote corre-l spondingparts, the reference character 10 indicates generally a housing provided with an attaching flange llhproj'ecting outwardly in" continuousformation about the entire perf imeter thereof and to lie flush against the adja'cent side of a conventional form of liquid dispensing pump, not shown, generally em-- ployed for gasoline andoil A shaft member 12, carried by and forming a partof the present invention, carriesa spur gear, not shown, for meshing engagement with the rack bar portion of the gasoline pump: plunger rod in a manner to be better under-Z stood in'the following description of the in;- ventioni .v i

A stubshaft 13, having an enlarged socket portion 14:; upon one end. thereof and, jour-I' naled withinthebore of a boxf15, carried by the housing 10, is designed to accommodate" the outermost projecting'end of the shaft 12 v wlhereby the supportnforthe latter is'comp ete. i f "A wormshaft 16, journaled at intervals upon and'between bearing members 17 and 18, hasa worm' portion 19 ,meshingly engaged with a worm gear 20 keyed or otherwise fixed to the outermost projecting end or the stub shaft 13. A crank'handle, such as indicated at 21, for operating the worm shaft 16, is preferably provided with a ratchetconnection therebetween whereby the shaft'16 may be operatedonly in a clockwise direction Under ordinary circumstances, the shafts'12 and 13 are free and the gasoline or oil pump plunger rod will be normally retracted to 0(; j cupy a lowered or inactive position. A collar member 22,fixed upon the shaft12, through the instrumentality of a cross pin 23,,

carriesfa 'clutchelement 24 of disk like formation having radially disposed fingers or A diskmember 26, carried by andoperable in conjunction withan enlarged shoulder portion 27 formed upon the inner portion of the socket portion 14, carries a bearing face-28 upon its inner side for abutting engagement curing the locking dogs and coin engagingv elements in shafts.

The disk like clutch element 24 is to be arposition foruse upon the rock ranged upon the shaft 12 in such manner and position so that the coin receiving slots 37 inwardly projecting: from diametrically opposite sides thereof, for the accommodation of coins of different denominations, may be aligned or otherwise registered with the inwardly and laterally projecting portions of laterally projecting portions of the passagecoin introducing slots 38 in the housing 10. Said slots are of L-shape formation and have their outermost ends in communication with cylindricalopenings 39 by means of which projecting of the operators finger will be permitted to introduce the coin against the ten sion' of a coin shifting or placing lever 40. The axis 41 for the lever has a compression spring 42 wound thereabout and engageable with one side edge of the lever 40 to normally dispose the latter to occupy the positionshown in Figure 3 of the drawings whereby authorized coins of proper denomination will be shifted inwardly through the w'aysfor accommodation within the slots 37. Coin holding fingers 43 carried by the collar member 22, are curved, adjacent their outermost ends, in conformity'to the particular size of the immediate coin and provided with seats 44 to hold the coins when the lever or crank 21 is being actuated to shift or otherwise rotate the disk 26 whereby the shoulder 45 of the intermediate coin engaging element 33 will engage and bear against the immediate coin with sufiicient force to rock the immediate shaft 31, dislodge the spring pressed ball 46 holding the adjacent locking dog in normally inoperative position Wherebythe latter will engage the adjacent of the clutch fingers 25 upon the disk 24 -to lock the entire assemblage whereby the pumpplunger rod may be actuated to dispense the amount of gasoline or oil actually purchased.

Provision is also made for-releasing the locking dogs v32 from the clutch fingers 25 at predeterminedintervals whereby the pump piston or plunger will be disengaged after the quantity of gasoline or oil has been dispensed. The aforementioned is accomplished through the:provision and arrangement of pro ections 47 upon the shorter ends of the ecoentrically mounted locking dogs 32 and which are shifted for abutting engagement with the inclined faces 48 of members 49 permanently located upon appropriate portions of the housing 10 and at intervals.

During the synchronous rotary motion of the lockingly engaged clutch elements, the coin is shifted into position for contacting engagement with a coin releasing finger 50 which will allow the coin to drop down into the bottom or coin compartment of the housing. Each of the locking dogs 32 is provided With multiple pockets for the accommodation of the spring pressed balls 46 whereby the locking dogs will-be yieldingly maintained against displacement from either of their respective positions.

" A leaf spring 51 is located adjacent, the

entrance of the coin receiving. slots to deflect counterfeit light weightslugs or cardboard disks and magnets '52 are arranged immedi-. ately adjacent the coin receiving slots 37 in the clutch element 24 to magnetize or otherwise attract spurious magnetically attractive coin substitutes whereby the attachment will be rendered fool-proof.

As will be noted fromthe foregoing de scription and accompanying drawingspthe invention may be easily andefiectively employed upon the usual crank shafts of liquid dispensing pumps of different makes and will permit the owners of gasoilne filling stations and the like to leave their stations unattended along highways and other places.

7 The invention is susceptible of. various changes in its form, proportions and minor,

details of construction andthe right is herein reserved to make such changes as properly fall within the scope of the appended clalms.

.Having described the invention, what isolaimed is:

1. A coin control comprising a housing,v

alignedshafts journaled for rotation, clutch members imounted upon the respective shafts;

one clutch member having a slot for receiving the coin, a dog pivoted upon. the, other; clutch member and adapted to be swung by.

the coin whereby thevclutch members are locked, means for turning one of the shafts and means for ejecting the'coin to release the dog and unlock the clutch members.

2. A coin control comprising rotatable shafts arranged in axial alignment, clutch members mountedupon the respective-shafts,

one of the clutch members being provided;

with a coin receiving slot, a dog pivoted upon the other clutch member, an abutment car'- ried on the first clutchmember for engagement by said dog,-a coin engaging element connected in common with the dog to'shift the latter into obstructing relation with said abutment, means for turning one of the shafts, and means for ejecting-thecoia after a specified angular movement of the shafts to release the-dog and thereby unlock the clutch members. I

3. A coin control comprising rotatable shafts arranged in axial alignment, clutch members mounted upon the respective shafts, one of the clutch members being provided with a coin receiving slot, a dog pivoted upon the other clutch member, an abutment carried on the first clutch member for engagement by said dog, a coin engaging element connected in common with the dog to shift the latter into obstructing relation with said abutment, means for turning one of the shafts, and means for ejecting the coin after a specified angular movement of the shafts to release the dog and thereby unlock the clutch members, the dog and coin engaging element being mounted on a common rock shaft.

4. A coin control comprising rotatable shafts arranged in axial alignment, clutch members mounted upon the respective shafts, one of the clutch members being provided with a coin receiving slot,a dog pivoted upon the other clutch member, an abutment carried on the first clutch member for engage ment by said dog, a coin engaging element connected in common with the dog to shift the latter into obstructing relation with said abutment, means for turning one of the shafts, and means for" ejecting the coin after a specified angular movement of the shafts to release the dog and thereby unlock the clutch members, the dog and coin engaging element being mounted on a common rock shaft, and a spring pressed member engaging the dog to releasably retain it is its operative position of engagement with the abutment. Y

5. A coin control comprising rotatable shafts arranged in axial alignment, clutch members mounted upon the respective shafts, one of the clutch members being provided with a coin receiving slot, a dog pivoted upon the other clutch member, an abutment carried on the first clutch member for engagement by said dog, a coin engaging element connected in common with the dog to shift the latter into obstructing relation with said abutment, means for turning one of the shafts, and means for ejecting the coin after a specified angular movement of the shafts to release the dog and thereby unlock the clutch members, the dog and coin engaging element being mounted on a common rock shaft, the coin ejecting means comprising a fixedly mounted finger effecting a camming action on the coin to disengage it from the coin engaging element.

In testimony whereof I aflix my signature.

FRED J. MGNAMARA. 

